Browsing by Subject "security"
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- ItemOpen AccessMeditative Reflections on Nils Christie’s "Words on Words" - through an African lens(Taylor & Francis, 2013) Froestad, Jan; Shearing, CliffordLike so much else that comes from the pen of Nils Christie, his "Words on Words" that have inspired this special issue, and with which it begins, have, as they so often do, inspired us to engage in a meditative reflection on his words and their implications for our thinking and practice. We have sought, through these reflections on the wisdom of Christie’s words, to better understand the security governance practices we have been studying, developing and, sometimes, promoting.
- ItemOpen AccessSecurity for networked smart healthcare systems: A systematic review(2022) Ndarhwa, Nyamwezi Perfect; Malila, Bessie; Douglas, TaniaBackground and Objectives Smart healthcare systems use technologies such as wearable devices, Internet of Medical Things and mobile internet technologies to dynamically access health information, connect patients to health professionals and health institutions, and to actively manage and respond intelligently to the medical ecosystem's needs. However, smart healthcare systems are affected by many challenges in their implementation and maintenance. Key among these are ensuring the security and privacy of patient health information. To address this challenge, several mitigation measures have been proposed and some have been implemented. Techniques that have been used include data encryption and biometric access. In addition, blockchain is an emerging security technology that is expected to address the security issues due to its distributed and decentralized architecture which is similar to that of smart healthcare systems. This study reviewed articles that identified security requirements and risks, proposed potential solutions, and explained the effectiveness of these solutions in addressing security problems in smart healthcare systems. Methods This review adhered to the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines and was framed using the Problem, Intervention, Comparator, and Outcome (PICO) approach to investigate and analyse the concepts of interest. However, the comparator is not applicable because this review focuses on the security measures available and in this case no comparable solutions were considered since the concept of smart healthcare systems is an emerging one and there are therefore, no existing security solutions that have been used before. The search strategy involved the identification of studies from several databases including the Cumulative Index of Nursing and Allied Health Literature (CINAL), Scopus, PubMed, Web of Science, Medline, Excerpta Medical database (EMBASE), Ebscohost and the Cochrane Library for articles that focused on the security for smart healthcare systems. The selection process involved removing duplicate studies, and excluding studies after reading the titles, abstracts, and full texts. Studies whose records could not be retrieved using a predefined selection criterion for inclusion and exclusion were excluded. The remaining articles were then screened for eligibility. A data extraction form was used to capture details of the screened studies after reading the full text. Of the searched databases, only three yielded results when the search strategy was applied, i.e., Scopus, Web of science and Medline, giving a total of 1742 articles. 436 duplicate studies were removed. Of the remaining articles, 801 were excluded after reading the title, after which 342 after were excluded after reading the abstract, leaving 163, of which 4 studies could not be retrieved. 159 articles were therefore screened for eligibility after reading the full text. Of these, 14 studies were included for detailed review using the formulated research questions and the PICO framework. Each of the 14 included articles presented a description of a smart healthcare system and identified the security requirements, risks and solutions to mitigate the risks. Each article also summarized the effectiveness of the proposed security solution. Results The key security requirements reported were data confidentiality, integrity and availability of data within the system, with authorisation and authentication used to support these key security requirements. The identified security risks include loss of data confidentiality due to eavesdropping in wireless communication mediums, authentication vulnerabilities in user devices and storage servers, data fabrication and message modification attacks during transmission as well as while the data is at rest in databases and other storage devices. The proposed mitigation measures included the use of biometric accessing devices; data encryption for protecting the confidentiality and integrity of data; blockchain technology to address confidentiality, integrity, and availability of data; network slicing techniques to provide isolation of patient health data in 5G mobile systems; and multi-factor authentication when accessing IoT devices, servers, and other components of the smart healthcare systems. The effectiveness of the proposed solutions was demonstrated through their ability to provide a high level of data security in smart healthcare systems. For example, proposed encryption algorithms demonstrated better energy efficiency, and improved operational speed; reduced computational overhead, better scalability, efficiency in data processing, and better ease of deployment. Conclusion This systematic review has shown that the use of blockchain technology, biometrics (fingerprints), data encryption techniques, multifactor authentication and network slicing in the case of 5G smart healthcare systems has the potential to alleviate possible security risks in smart healthcare systems. The benefits of these solutions include a high level of security and privacy for Electronic Health Records (EHRs) systems; improved speed of data transaction without the need for a decentralized third party, enabled by the use of blockchain. However, the proposed solutions do not address data protection in cases where an intruder has already accessed the system. This may be potential avenues for further research and inquiry.
- ItemOpen AccessUnderstanding Railway Trespassing in a South African City: The Case Of Cape Town(2020) Williams, Faizel; Vanderschuren, MarianneTrespassing behaviour is a problem for railway operations and manifests itself through train-pedestrian collisions, incidents of theft and vandalism to rail infrastructure, as well as encroachment on railway property. The study has consisted of a quantitative and a qualitative part. The quantitative part analyses demographic, temporal and spatial data on train-pedestrian fatalities and injuries, as well as data on occurrences of theft and malicious damage to rail infrastructure in the Cape Town Functional Region between 2015 and 2018. The qualitative part presents the perspective from a diverse group of subject matter experts, having explored opinions on trespassing behaviours and preventative measures. Additionally, the trespassing behaviour at several sites was investigated and a case study evaluation of the efficacy of a pilot Rail Enforcement Unit was carried out. There were 456 railway-related deaths during the study period with 330 of this being train-pedestrian collisions. There were 4715 occurrences of theft and malicious damage to railway assets over the period. Several hot-spot areas were identified via the data and interviews with experts and several sites chosen for further verification. Site visits confirmed widespread trespassing behaviours with the two worst locations recording an average of over 300 persons in a 15-minute period. The case study reviewing the effectiveness of the security and enforcement countermeasure revealed that occurrences of train-pedestrian incidents, as well as security occurrences have increased by 1.4% and 7.5% respectively. Evidence of geographical displacement of crime is evident, suggesting that enforcement countermeasures are temporarily effective and need to be considered in combination with other measures to ensure its durability. In conclusion, this research presents a detailed analysis of railway trespassing and its main effects in order to understand the problem locally. Different approaches are required to combat the various guises of railway trespassing. Certain countermeasures may well be within the rail operator's remit, but essentially, the nature of problems experienced by the rail operator is beyond a rail problem, and requires a systems approach involving multiple authorities